Organizers of a Colorado shooting competition have canceled the event because of the state's recently passed gun-control laws.

The International Defensive Pistol Association was scheduled to hold its Rocky Mountain regional championship July 4-6 in Montrose. Organizers said an estimated 300 shooters were expected to attend the event.

The cancellation stemmed from a combination of concern about legal liabilities under the new laws, and political opposition, said IDPA spokesman Paul Erhardt.

"The attitude toward Colorado is not very pleasant among firearm owners," he said.

Gunmaker Ruger canceled another event, the Ruger Rimfire Challenge World Championship, which was to be held in Byers on July 19-21.

The Colorado legislature recently passed three gun-control measures. The laws restrict magazines to no more than 15 rounds, require universal background checks on sales and charge gun buyers for the checks.

Several hunting groups and individuals have said they will boycott hunting in Colorado this fall. Some Colorado-based manufacturers of magazines and their parts said they will relocate operations because of the gun laws.